Phenotypic and genotypic changes in French populations of Phytophthora infestans: are invasive clones the most aggressive?
Phenotypic and genotypic changes in French populations of Phytophthora infestans: are invasive clones the most aggressive?
复制标题
法国致病疫霉种群的表型和基因型变化：入侵性克隆是最具攻击性的吗？
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
D. Andrivon
中科院分区：
文献类型：
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作者：
Nicolas Mariette;R. Mabon;R. Corbière;F. Boulard;I. Glais;B. Marquer;C. Pasco;J. Montarry;D. Andrivon
这项研究的主要目的是验证“总是更具侵略性”的假设，该假设通常被提倡解释马铃薯晚疫病卵菌疫霉无性系群体的谱系替换。为此，分析了2001-2008年期间收集的1274株法国病原菌的基因型和致病性数据。总体而言，样本群体的遗传多样性有限，4个多位点谱系（1_A1, 2_A1, 8_A1和13_A2）占收集到的分离物的80%以上。与其他西欧国家一样，在8年的过程中观察到这些优势克隆谱系的剧烈变化，特别是在克隆13_A2的外观和繁殖方面。然而，克隆的入侵性与较高的攻击性无关；相反，优势无性系在同一种群中，相对于其他无性系具有较低或中等的攻击性。这一发现挑战了通常认为的这种生物营养性病原体的入侵行为与侵略性增加之间的联系，并可能反映出季节内和季节间传播之间存在权衡。这与包容性适应度的概念是一致的，这涉及到繁殖和生存的能力。
The main objective of this investigation was to test the ‘always more aggressive’ hypothesis, often advocated to explain lineage replacements in clonal populations of the potato late blight oomycete Phytophthora infestans. To this end, genotypic and pathogenicity data on 1274 French isolates of P. infestans, collected over the period 2001–2008, were analysed. Overall, the populations sampled showed limited genetic diversity, with four multilocus lineages (1_A1, 2_A1, 8_A1 and 13_A2) accounting for over 80% of the isolates collected. As in other West European countries, drastic changes in these dominant clonal lineages were observed over the course of the 8 years, particularly in the appearance and propagation of the clone 13_A2. However, invasiveness of clones was not associated with higher aggressiveness; on the contrary, dominant clones had generally low or moderate aggressiveness relative to others present at the same time within the same populations. This finding challenges the link between invasive behaviour and increased aggressiveness often assumed for this biotrophic pathogen, and could reflect the existence of a trade-off between intra-season and inter-season transmission. This would be consistent with the concept of inclusive fitness, which involves the abilities to both reproduce and survive.
影响因子：
6.7
作者：
Cooke DE;Cano LM;Raffaele S;Bain RA;Cooke LR;Etherington GJ;Deahl KL;Farrer RA;Gilroy EM;Goss EM;Grünwald NJ;Hein I;MacLean D;McNicol JW;Randall E;Oliva RF;Pel MA;Shaw DS;Squires JN;Taylor MC;Vleeshouwers VG;Birch PR;Lees AK;Kamoun S
通讯作者：
Kamoun S